The notion of infinity is fundamentally beyond the human ability to comprehend, but that hasn’t stopped mathematicians from trying. So just what is infinity, and why is there more than one of them?

Infinity is an elusive concept that can often be difficult to comprehend. In order to better define what infinity actually is, we brought in Eugenia Cheng, a mathematician and the author of "Beyond ...

The physical—and metaphysical—topic of infinity can be reflected upon in various ways. Yet, in examining a multitude of quotes on this most fascinating subject of boundlessness and inexplicability, I ...

NOVA: How do mathematicians define infinity? Netz: Something which is equal to some of its parts. That's really the technical definition. NOVA: Is there a difference between the mathematical concept ...